Technical Guide Proximity Sensors - Omron
CSM Proximity TG E 6 1 Technical Guide Proximity Sensors Overview What Are Proximity Sensors? "Proximity Sensor" includes all sensors that perform non-contact detection in comparison to sensors, such as limit switches, that detect objects by physically contacting them. Proximity Sensors convert information on the movement or presence of an object into an electrical signal. There are three types of detection systems that do this conversion: systems that use the eddy currents that are generated in metallic sensing objects by electromagnetic induction, systems that detect changes in electrical capacity when approaching the sensing object, and systems that use magnets and reed switches. The Japanese Industrial Standards (JIS) define proximity sensors in JIS C 8201-5-2 (Low-voltage switch gear and control gear, Part 5: Control circuit devices and switching elements, Section 2: Proximity sensors), which conforms to the IEC 60947-5-2 definition of non-contact position detection switches. JIS gives the generic name "proximity sensor" to all sensors that provide non-contact detection of target objects that are close by or within the general vicinity of the sensor, and classifies them as inductive, capacitive, ultrasonic, photoelectric, magnetic, etc. This Technical Guide defines all inductive sensors that are used for detecting metallic objects, capacitive sensors that are used for detecting metallic or non-metallic objects, and sensors that utilize magnetic DC fields as Proximity Sensors. Features (1) Proximity Sensors detect an object without touching it, and they therefore do not cause abrasion or damage to the object. Devices such as limit switches detect an object by contacting it, but Proximity Sensors are able to detect the presence of the object electrically, without having to touch it. (2) No contacts are used for output, so the Sensor has a longer service life (excluding sensors that use magnets). Proximity Sensors use semiconductor outputs, so there are no contacts to affect the service life. (3) Unlike optical detection methods, Proximity Sensors are suitable for use in locations where water or oil is used. Detection takes place with almost no effect from dirt, oil, or water on the object being detected. Models with fluororesin cases are also available for excellent chemical resistance. (4) Proximity Sensors provide high-speed response, compared with switches that require physical contact. For information on high-speed response, refer to Explanation of Terms on page 3. (5) Proximity Sensors can be used in a wide temperature range. Proximity Sensors can be used in temperatures ranging from 40 to 200 C. (6) Proximity Sensors are not affected by colors. Proximity Sensors detect the physical changes of an object, so they are almost completely unaffected by the object's surface color. (7) Unlike switches, which rely on physical contact, Proximity Sensors are affected by ambient temperatures, surrounding objects, and other Sensors. Both Inductive and Capacitive Proximity Sensors are affected by interaction with other Sensors. Because of this, care must be taken when installing them to prevent mutual interference (refer to page 8). Care must also be taken to prevent the effects of surrounding metallic objects on Inductive Proximity Sensors, and to prevent the effects of all surrounding objects on Capacitive Proximity Sensors. (8) There are Two-wire Sensors. The power line and signal line are combined. This reduces wiring work to 2/3 of that require for Three-wire Sensors. If only the power line is wired, internal elements may be damaged. Always insert a load (refer to page ntlp 6). 1
Proximity Sensors Technical Guide Operating Principles Detection Principle of Inductive Proximity Sensors Inductive Proximity Sensors detect magnetic loss due to eddy currents that are generated on a conductive surface by an external magnetic field. An AC magnetic field is generated on the detection coil, and changes in the impedance due to eddy currents generated on a metallic object are detected. Other methods include Aluminum-detecting Sensors, which detect the phase component of the frequency, and All-metal Sensors, which use a working coil to detect only the changed component of the impedance. There are also Pulse-response Sensors, which generate an eddy current in pulses and detect the time change in the eddy current with the voltage induced in the coil. Qualitative Explanation The sensing object and Sensor form what appears to be a transformer-like relationship. Sensing object Sensor Detection Principle of Capacitive Proximity Sensors Sensing object Sensor Capacitive Proximity Sensors detect changes in the capacitance between the sensing object and the Sensor. The amount of capacitance varies depending on the size and distance of the sensing object. An ordinary Capacitive Proximity Sensor is similar to a capacitor with two parallel plates, where the capacity of the two plates is detected. One of the plates is the object being measured (with an imaginary ground), and the other is the Sensor's sensing surface. The changes in the capacity generated between these two poles are detected. The objects that can be detected depend on their dielectric constant, but they include resin and water in addition to metals. Detection Principle of Magnetic Proximity Sensors The transformer-like coupling condition is replaced by impedance changes due to eddy-current losses. The impedance changes can be viewed as changes in the resistance that is inserted in series with the sensing object. (This does not actually occur, but thinking of it this way makes it easier to understand qualitatively.) Magnet The reed end of the switch is operated by a magnet. When the reed switch is turned ON, the Sensor is turned ON. Classification Selection by Detection Method Items Requiring Confirmation Inductive Proximity Sensors Capacitive Proximity Sensors Metallic objects, resins, liquids, powders, etc. Magnetic Proximity Sensors Sensing object Metallic objects (iron, aluminum, brass, copper, etc.) Electrical noise Affected by positional relationship of power lines and signal lines, grounding of cabinet, etc. CE Marking (EC Directive compliance) Sensor covering material (metal, resin). Easily affected by noise when the cable is long. Power supply DC, AC, AC/DC, DC with no polarity, etc. Connection method, power supply voltage. Current consumption Depends on the power supply, i.e., DC 2-wire models, DC 3-wire models, AC, etc. DC 2-wire models are effective for suppressing current consumption. Sensing distance The sensing distance must be selected by considering the effects of factors such as the temperature, the sensing object, surrounding objects, and the mounting distance between Sensors. Refer to the set distance in the catalog specifications to determine the proper distance. When high precision sensing is required, use a Separate Amplifier model. Ambient environment Temperature or humidity, or existence of water, oils, chemicals etc. Confirm that the degree of protection matches the ambient environment. Physical vibration, shock An extra margin must be provided in the sensing distance when selecting Sensors for use in environments subject to vibration and shock. To prevent Sensors from vibrating loose, refer to the catalog values for tightening torque during assembly. Assembly Effects of tightening torque, Sensor size, number of wiring steps, cable length, distance between Sensors, surrounding objects. Check the effects of surrounding metallic and other objects, and the specifications for the mutual interference between Sensors. Magnets Almost no effect. 2
Proximity Sensors Technical Guide Explanation of Terms Standard Sensing Object Response Time A sensing object that serves as a reference for measuring basic performance, and that is made of specified materials and has a specified shape and dimensions. Standard sensing object t1: The interval from the point when the standard sensing object moves into the sensing area and the Sensor activates, to the point when the output turns ON. t2: The interval from the point when the standard sensing object moves out of the Sensor sensing area to the point when the Sensor output turns OFF. Within range d t Proximity Sensor Sensing area ON Output Sensing Distance The distance from the reference position (reference surface) to the measured operation (reset) when the standard sensing object is moved by the specified method. Sensing surface ON Sensing object Proximity Sensor Sensing distance OFF t1 The number of detection repetitions that can be output per second when the standard sensing object is repeatedly brought into proximity. See the accompanying diagram for the measuring method. Output f t1 2M M Set Distance The distance from the reference surface that allows stable use, including the effects of temperature and voltage, to the (standard) sensing object transit position. This is approximately 70% to 80% of the normal (rated) sensing distance. Set distance t3 Standard sensing object M Non-metal Shielded Proximity Sensor Proximity Sensor Output Sensing surface Sensing object t2 1 (Sensing distance) 2 With a Shielded Sensor, magnetic flux is concentrated in front of the Sensor and the sides of the Sensor coil are covered with metal. The Sensor can be mounted by embedding it into metal. Rated sensing distance Output Sensing object Hysteresis (Differential Travel) With respect to the distance between the standard sensing object and the Sensor, the difference between the distance at which the Sensor operates and the distance at which the Sensor resets. ON Sensing object 1 t1 t2 Proximity Sensor Reset distance OFF t2 Response Frequency Output Reference position OFF Outside of range Sensing object Proximity Sensor d Specified sensing object: Material Shape Dimensions Speed, etc. Sensing distance Reset distance Proximity Sensor Unshielded With an Unshielded Sensor, magnetic flux is spread widely in front of the Sensor and the sides of the Sensor coil are not covered with metal. This model is easily affected by surrounding metal objects (magnetic objects), so care must be taken in selecting the mounting location. Output Proximity Sensor Hysteresis Output Sensing object 3
Proximity Sensors Technical Guide Expressing the Sensing Distance When measuring the sensing distance of a Proximity Sensor, the reference position and the direction of approach of the sensing object are determined as follows: Cylindrical/Rectangular Sensors Horizontal sensing distance and sensing area diagram Perpendicular sensing distance (Sensing distance) Reference axis Reset (OFF) Operate (ON) (Hysteresis) Reset (OFF) Operate (ON) Reference plane Sensing object (Hysteresis) Sensing object (Sensing distance) Reference axis Reference plane Proximity Sensor Proximity Sensor Expressed as the measured distance from the reference surface when the standard sensing object approaches from the radial direction (perpendicular to the sensing surface). Expressed as the measured distance from the reference axis when the standard sensing object is moved parallel to the reference surface (sensing surface). This distance depends on the transit position (distance from the reference surface), so it can be expressed as an operating point track. (Sensing Area Diagram) Output Configuration NPN transistor output A general-use transistor can be directly connected to a Programmable Controller or Counter. PNP transistor output Primarily built into machines exported to Europe and other overseas destinations. Non-polarity/non-contact output A 2-wire AC output that can be used for both AC and DC Sensors. Eliminates the need to be concerned about reversing the polarity. Take the following points into account when selecting a DC 2-wire model (polarity/no-polarity). (For details, refer to page 9). Leakage current: A maximum current of 0.8 mA flows to the load current even when the output is OFF. Check that the load will not operate with this current. Check that the load will operate with this load voltage. Output residual voltage: When the output is ON, voltage remains in the Sensor, and the voltage applied to the load decreases. Check that the load will operate with this load voltage. Output Configuration NO (normally open) NO When there is an object in the sensing area, the output switching element is turned ON. NC (normally closed) NC When there is no object in the sensing area, the output switching element is turned ON. NO/NC switchable NO/NC switching NO or NC operation can be selected for the output switching element by a switch or other means. 4
Proximity Sensors Technical Guide Interpreting Engineering Data 12 E2E-X10 10 Y 8 X 6 E2E-X5 E2E-X2 4 E2E -X1R5 2 0 -15 -10 -5 0 5 10 Distance Y (mm) This graph shows engineering data from moving the sensing object parallel to the sensing surface of the Proximity Sensor. Refer to this graph for Proximity Sensor applications, such as positioning. When a high degree of precision is required, use a Separate Amplifier Proximity Sensor. Leakage Current Characteristics Refer to Precautions for Correct Use on page 9. Effects of Sensing Object Size and Material Refer to Explanation of Terms on page 3. Refer to Precautions for Correct Use on page 8. E2C-EDR6-F E2E-X3D@/-X3T1 Distance X (mm) Distance X (mm) E2E-X@E@/-X@Y@/-X@F1 Sensing Distance vs. Display Characteristics Display value (digital) Sensing Area Refer to Explanation of Terms on page 3. 4000 3000 FP setting at 0.9 mm 2000 4.0 2.5 Stainless steel (SUS304) 2.0 1000 1.0 0.3 0.6 0.9 1.2 Sensing distance (mm) t 1 mm Iron 1.5 0 X 3.0 1500 FP setting at 0.3 mm @d 3.5 Brass Aluminum Copper 0.5 0 5 10 15 20 25 30 35 40 Side length (one side) of sensing object: d (mm) This type of graph is used with Separate Am- Here, the horizontal axis indicates the size of plifier Proximity Sensors. It shows the values the sensing object, and the vertical axis indiwhen executing FP (Fine Positioning) at cates the sensing distance. It shows changes specified distances. FP settings are possible in the sensing distance due to the size and at any desired distance, with a digital value of material of the sensing object. Refer to this 1,500 as a reference for the E2C-EDA. data when using the same Sensor to detect The above graph shows numerical examples various different sensing objects, or when when Fine Positioning is executed at the confirming the allowable leeway for detecthree points of 0.3, 0.6, and 0.9 mm. tion. Residual Voltage Characteristics Refer to Precautions for Correct Use on page 7. In contrast with contact-type limit switches, Similar to leakage current characteristics, rewhich have physical contacts, leakage cursidual voltage is something that occurs due to rent in a 2-wire Proximity Sensor is related to electrical switches that are comprised of tranan electrical switch that consists of transissistors and other components. For example, tors and other components. This graph indiwhereas the voltage in a normally open cates the leakage current characteristics switch should be 0 V in the ON state, and the caused by transistors in the output section of same as the power supply voltage in the OFF the Sensor. state, residual voltage refers to a certain level Generally speaking, the higher the voltage, of voltage remaining in the switch. Be careful the larger the leakage current. Because leakof this factor when replacing a limit switch, miage current flows to the load connected to cro-switch, or other switch with a Proximity the Proximity Sensor, care must be taken to Sensor. select a load that will not cause the Sensor to operate from the leakage current. Be careful of this factor when replacing a limit switch, micro-switch, or other switch with a Proximity Sensor. 5
Proximity Sensors Technical Guide For precautions on individual products, refer to the Safety Precautions in individual product information. General Precautions WARNING These products cannot be used in safety devices for presses or other safety devices used to protect human life. These products are designed for use in applications for sensing workpieces and workers that do not affect safety. Precautions for Safe Use To ensure safety, always observe the following precautions. Wiring Considerations Item Power Supply Voltage Do not use a voltage that exceeds the operating voltage range. Applying a voltage that is higher than the operating voltage range, or using an AC power supply (100 VAC or higher) for a Sensor that requires a DC power supply may cause explosion or burning. Load short-circuiting Typical examples DC 3-Wire NPN Output Sensors DC 2-Wire Sensors Load Brown Sensor Load Brown Sensor Black Blue Blue DC 2-Wire Sensors Even with the load short-circuit protection function, protection will not be provided when a load short circuit occurs if the power supply polarity is not correct. DC 3-Wire NPN Output Sensors Do not short-circuit the load. Explosion or burning may result. The load short-circuit protection function operates when the power supply is connected with the correct polarity and the power is within the rated voltage range. Load Load Brown Sensor Black (Load short circuit) Brown Be sure that the power supply polarity and other wiring is correct. Incorrect wiring may cause explosion or burning. Blue DC 3-Wire NPN Output Sensors Load Brown Sensor Black Brown Sensor If the power supply is connected directly without a load, the internal elements may explode or burn. Be sure to insert a load when connecting the power supply. Load Blue Black Blue Connection without a Load Sensor Blue Incorrect Wiring (Load short circuit) DC 2-Wire Sensors Even with the load short-circuit protection function, protection will not be provided if both the power supply polarity is incorrect and no load is connected. AC 2-Wire Sensors Brown Sensor Brown Sensor Blue Blue Operating Environment Do not use the Sensor in an environment where there are explosive or combustible gases. 6
Proximity Sensors Technical Guide Precautions for Correct Use The following conditions must be considered to understand the conditions of the application and location as well as the relation to control equipment. Model Selection Item Points of consideration Specific condiDirection of obtions of object ject movement Check the relation between the sensing object and the Proximity Sensor. Sensing object and operating condition of Proximity Sensor Material, size, shape, existence of plating, etc. Sensing object Material, distance to Sensor, orientation, etc. Fluctuation in transit point, allowable error, etc. Sensing (set) distance, shape of Sensor (rectangular, cylindrical, throughbeam, grooved), influence of peripheral metal (Shielded Sensors, Nonshielded Sensors), response speed (response frequency), influence of temperature, influence of voltage, etc. Surrounding metals Output Load Power supply Switching element Proximity Sensor Verify the electrical conditions of the control system to be used and the electrical performance of the Power Proximity Sensor. supply Load DC (voltage fluctuation, current capacity value) AC (voltage fluctuation, frequency, etc.) Need for S3D2 Controller Selecting the power supply type DC DC S3D2 Controller AC Resistive load - Non-contact control system Inductive load - Relay, solenoid, etc. Steady-state current, inrush current Operating, reset voltage (current) Lamp load Steady-state current, inrush current Open/close frequency Selecting the power supply type DC DC S3D2 Controller AC Control output Maximum current (voltage) Leakage current Residual load voltage { { Water Resistance Do not use the Sensor in water, rain, or outdoors. The environmental tolerance of the Proximity Sensor is better than that of other types of Sensors. However, investigate carefully before using a Proximity Sensor under harsh temperatures or in special atmospheres. Environmental conditions Sensing distance Sensing distance Proximity Sensor Electrical conditions Transit interval, speed, existence of vibration, etc. Peripheral metal Ambient Conditions To maintain reliability of operation, do not use the Temperature Highest or lowest Temperature influence, Sensor outside the specified temperature range or and humidity values, existence high-temperature use, outdoors. Even though the Proximity Sensor has a of direct sunlight, low temperature use, water-resistant structure, it must be covered to prevent direct contact with water or water-soluble cutetc. need for shade, etc. ting oil. Do not use the Sensor in atmospheres with vapors, in particular, strong alkalis or acNeed for water resis- chemical Atmosphere Water, oil, iron ids (nitric acid, chromic acid, or hot concentrated tance or oil resistance, sulfuric acid). powder, or other special chemicals need for explosion Explosive Atmospheres proof structure Do not use the Sensor in atmospheres where Vibration and Size, duration Need for strength, there is a danger of explosion. Use an Explosionshock mounting method proof Sensor. When deciding the mounting method, take into consideration not only restrictions due to mechanical devices, but also ease of maintenance and inspection, and interference between Sensors. Mounting conditions Wiring method, existence of inductance surges Connection Wires Wire type, length, oil-resistant cable, shielded cable, robot cable, etc. Mounting procedure Installation location Conduits, ducts, pre-wired, terminal wiring, ease of maintenance and inspection Existence of mounting brackets, direct mounting, secured with bolts or screws Ease of maintenance and inspection, mounting space Influence of external electromagnetic fields The influence within a DC magnetic field is 20 mT* max. Do not use the Sensor at a level higher than 20 mT. Sudden changes in the DC magnetic field may cause malfunction. Do not use the Sensor for applications that involve turning a DC electromagnet ON and OFF. Do not place a transceiver near the Sensor or its wiring. Doing so may cause malfunction. Other considerations Cost feasibility: Price/delivery time Life: Power-ON time/frequency of use * mT (millitesla) is a unit for expressing magnetic flux density. One tesla is the equivalent of 10,000 gauss. 7
Proximity Sensors Technical Guide Design Sensing Object Material Sensing distance X (mm) 8 Stainless steel 6 Brass 4 Aluminum 2 0 Copper 5 10 15 20 25 30 35 40 45 50 55 Side length (one side) of sensing object: d (mm) Sensing object shape: Square d 30mm Reset Operate 10 Steel 8 6 4 2 Aluminum 0 0.01 0.1 1 10 Thickness of sensing object: t (mm) Influence of Plating If the sensing object is plated, the sensing distance will change (see the table below). Effect of Plating (Typical) (Reference values: Percent of non-plated sensing distance) Sensing distance X (mm) Size of Sensing Object In general, if the object is smaller than the standard sensing object, the sensing distance decreases. Design the setup for an object size that is the same or greater than the standard sensing object size from the graphs showing the sensing object size and sensing distance. When the size of the standard sensing object is the same or less than the size of the standard sensing object, select a sensing distance with sufficient leeway. The thickness of ferrous metals (iron, nickel, etc.) must be 1 mm or greater. For non-magnetic metal, a sensing distance equivalent to a magnetic body can be obtained when the coating thickness is 0.01 mm or less. With pulseresponse models (e.g., E2V), however, the characteristics may vary. Be sure to check the catalog information for the relevant model. When the coating is extremely thin and is not conductive, such as a vacuum deposited film, detection is not possible. Sensing distance X (mm) Thickness of Sensing Object The sensing distance varies greatly depending on the material of the sensing object. Study the engineering data for the influence of sensing object material and size and select a distance with sufficient leeway. In general, if the Example: E2-X10D@ sensing object is a non14 t 1mm X magnetic metal (for 12 d example, aluminum), the sensing distance Steel 10 decreases. (SPCC) Thickness and base material of plating No plating Side length (one side) of sensing object: d (mm) Sensing Standard Stability distance sensing becomes object short Steel Brass 100 100 Zn 5 to 15 µm 90 to 120 95 to 105 Cd 5 to 15 µm 100 to 110 95 to 105 Ag 5 to 15 µm 60 to 90 85 to 100 Cu 10 to 20 µm 70 to 95 95 to 105 Cu 5 to 15 µm - 95 to 105 Cu (5 to 10 µm) Ni (10 to 20 µm) 70 to 95 - Cu (5 to 10 µm) Ni (10 µm) Cr (0.3 µm) 75 to 95 - Mutual Interference Mutual interference refers to a state where a Sensor is affected by magnetism (or static capacitance) from an adjacent Sensor and the output is unstable. One means of avoiding interference when mounting Proximity Sensors close together is to alternate Sensors with different frequencies. The model tables indicate whether different frequencies are available. Please refer to the tables. When Proximity Sensors with the same frequency are mounted together in a line or face-to-face, they must be separated by a minimum distance. For details, refer to Mutual Interference in the Safety Precautions for individual Sensors. Power Reset Time A Sensor is ready for detection within 100 ms after turning ON the power. If the load and Sensor are connected to separate power supplies, design the system so that the Sensor power turns ON first. 8
Proximity Sensors Technical Guide Turning OFF the Power An output pulse may be generated when the power is turned OFF, so design the system so that the load or load line power turns OFF first. Influence of Surrounding Metal The existence of a metal object other than the sensing object near the sensing surface of the Proximity Sensor will affect detection performance, increase the apparent operating distance, degrade temperature characteristics, and cause reset failures. For details, refer to the influence of surrounding metal table in Safety Precautions for individual Sensors. Particularly the distance m that separates a metal surface that faces the Sensor's sensing surface will influence performance, such as shortening the sensing distance. The values in the table are for the nuts provided with the Sensors. Changing the nut material will change the influence of the surrounding metal. Power Transformers Be sure to use an insulated transformer for a DC power supply. Do not use an auto-transformer (single-coil transformer). Countermeasures for Leakage Current (Examples) AC 2-Wire Sensors Connect a bleeder resistor to bypass the leakage current flowing in the load so that the current flowing through the load is less than the load reset current. When using an AC 2-Wire Sensor, connect a bleeder resistor so that the Proximity Sensor current is at least 10 mA, and the residual load voltage when the Proximity Sensor is OFF is less than the load reset voltage. Load Calculate the bleeder resistance and allowable power using the following equation. Influence of Leakage Current Even when the Proximity Sensor is OFF, a small amount of current runs through the circuit as leakage current. For this reason, a small current may remain in the load (residual voltage in the load) and cause load reset failures. Verify that this voltage is lower than the load reset voltage (the leakage current is less than the load reset current) before using the Sensor. Vs R 10 - I P Precautions for AC 2-Wire/DC 2-Wire Sensors Surge Protection Although the Proximity Sensor has a surge absorption circuit, if there is a device (motor, welder, etc.) that causes large surges near the Proximity Sensor, insert a surge absorber near the source of the surges. AC power supply voltage Vs Bleeder resistor R I (kΩ) P Vs2 (mW) R : Watts of bleeder resistance (the actual number of watts used should be several times this number) : Load current (mA) It is recommend that leeway be included in the actual values used. For 100 VAC, use 10 kΩ or less and 3 W (5 W) or higher, and for 200 VAC, use 20 kΩ or less and 10 W (20 W) or higher. If the effects of heat generation are a problem, use the number of watts in parentheses ( ) or higher. DC 2-Wire Sensors Connect a bleeder resistor to bypass the leakage current flowing in the load, and design the load current so that (leakage current) (load input impedance) reset voltage. Using an Electronic Device as the Load for an AC 2-Wire Sensor Load When using an electronic device, such as a Timer, some types of devices use AC half-wave rectification. When a Proximity Sensor is connected to a device using AC half-wave rectification, only AC halfwave power will be supplied to the Sensor. This will cause the Sensor operation to be unstable. Also, do not use a Proximity Sensor to turn the power supply ON and OFF for electronic devices that use DC halfwave rectification. In such a case, use a relay to turn the power supply ON and OFF, and check the system for operating stability after connecting it. Bleeder resistor R Examples of Timers that Use AC Half-wave Rectification Timers: H3Y, H3YN, H3RN, H3CA-8, and H3CR (-A, -A8, -AP, -F, -G) Vs Calculate the bleeder resistance and allowable power using the following equation. Vs R iR - iOFFR (kΩ) P Vs2 R (mW) P : Watts of bleeder resistance (the actual number of watts used should be several times this number) iR : Leakage current of Proximity Sensor (mA) iOFFR : Load reset current (mA) It is recommend that leeway be included in the actual values used. For 12 VDC, use 15 kΩ or less and 450 mW or higher, and for 24 VDC, use 30 kΩ or less and 0.1 W or higher. 9
Proximity Sensors Technical Guide Loads with Large Inrush Current Loads, such as lamps or motors, that cause a large inrush current* will weaken or damage the switching element. In this situation, use a relay. Removing Whil
Proximity Sensor Sensing object Reset distance Sensing distance Hysteresis OFF ON Output Proximity Sensor Sensing object Within range Outside of range ON t 1 t 2 OFF Proximity Sensor Sensing object Sensing area Output (Sensing distance) Standard sensing object 1 2 f 1 Non-metal M M 2M t 1 t 2 t 3 Proximity Sensor Output t 1 t 2 Sensing .
14 Omron E3Z-LS Photoelectric Switch 15 2 Omron Photoelectric Switch 16 2 Omron Photoelectric Switches 17 3 Omron Proximity Switches 18 Omron Photoelectric Sensor 19 Quantity Pneumatic Fittings, to 3 tubs 20 Quantity various Air Filters, to Bosch, Schroder,
We continue to develop NEW proximity sensor technology, therefore Omron’s proximity sensor history is also the world’s proximity sensor history. Technology & sales 2015 2013 2000’s 90’s 80’s 70’s 1960 First PROX in the World TL family development E2C, E2F, E2E families for special applications and first capacitive sensor in .
Hartmann Tensoval Duo Control II Omron HEM-7420 Transtek TMB-1776 Hingmed WBP-02A Hospital Omron HEM-9600T Welch Allyn ProBP 2000 iHealth CardioMed (ABP100) Omron HEM-9601T Withings BP-800 InBody BP170 Omron HEM-9700T Yuwell YE680B InBody BPBIO250 Omron M3 (HEM-7200-E) Yuwell YE690A # 1-Star Blood Pressure Monitors # A&D TM-2420 Microlife BP A100
4.2.5 P F NAMUR sensors NJ2-V3-N (N) 20 4.3 Reed type proximity switches 21 4.3.1 SPST Maxx-Guard proximity sensors (L, P) 21 4.3.2 SPDT Maxx-Guard proximity sensors (G, H, S) 22 4.3.3 Intrinsically safe models with SPST Maxx-Guard proximity sensors (J) 23 4.3.4 Intrinsically safe
Other examples of sensors Heart monitoring sensors "Managing Care Through the Air" » IEEE Spectrum Dec 2004 Rain sensors for wiper control High-end autos Pressure sensors Touch pads/screens Proximity sensors Collision avoidance Vibration sensors Smoke sensors Based on the diffraction of light waves
require more maintenance. · Mounting the sensor further from the detection object may eliminate unneeded contact with the sensor, which will extend the life of the sensor. e18-6 Sensors 1-800-633-0405 Volume 14 Stainless Steel Triple-sensing Proximity Sensors
The Klinkmann OMRON Tag Creator is an add-on module for Wonderware InTouch WindowMaker, used to expand the functionality and capability of InTouch at design time. The Omron PLC programs created by the OMRON CX-Programmer Windows
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